|Year|Competition|Venue|Position|Event|Notes|
|---|---|---|---|---|---|
|2002|Central American and Caribbean Junior Championships (U-17)|Bridgetown, Barbados|1st|5 km|21:24.33 CR|
|2004|Central American and Caribbean Junior Championships (U-20)|Coatzacoalcos, México|1st|10 km|43:21.99|
|2004|World Junior Championships|Grosseto, Italy|4th|10 km|41:01.64|
|2005|World Championships|Helsinki, Finland|8th|20 km|1:20:45|
|2006|Central American and Caribbean Games|Cartagena, Colombia|2nd|20 km|1:26:30|
|2007|World Championships|Osaka, Japan|4th|20 km|1:23:36|
|2008|Olympic Games|Beijing, PR China|15th|20 km|1:21:53|
|2009|World Championships|Berlin, Germany|3rd|20 km|1:19:22|
|2010|Central American and Caribbean Games|Mayagüez, Puerto Rico|1st|20 km|1:22:32 GR|
|2011|World Championships|Daegu, Korea|15th|20 km|1:23:05|
|2011|Pan American Games|Guadalajara, Mexico|6th|20 km|1:25:00|

Question: how many times did they participate in the world championships?
Answer: 4